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post #441 of 3170
I have an ASRock Extreme 4 z77 motherboard, paired with a Core i7 2600K. No problems so far.

Initially, I put 2 sticks of Samsung 30nm ultra low profile RAM for the total of 8GB and was able to overclock it to 2133MHz 10-11-11-28-1T fully stable at 1.45V DRAM. I later added 2 more of the same sticks, and could not get all 4 to [almost] the same settings and remain stable under prime95 / MemTest (the in-Windows version) up to DRAM of 1.6V, although it was certainly stable enough for normal operations (but I did not want to take risks of having random unanticipated crashes).

I ended up going down to 1866MHz at 9-9-9-24-1T at 1.4V DRAM, which I later bumped to 1.45V just in case, although it was not necessary.

I wonder if I can still get a stable 2133MHz configuration with reasonable timings if I tweak some other voltages. So far, tweaking VTT voltage was not helpful (up to VTT of 1.113V), and in some cases even increased the instability. My CPU voltage is -0.15V offset, although reducing the offset a bit did not help too much.

I have the maximum turbo boost (per core) set to 4.2GHz at Voffset -0.15V.

Definitely interested in tweaking my system more to see if I can get more performance without increasing power consumption and temperatures much if at all. If anyone has any recommendations, I'd appreciate them. I was looking into updating my motherboard BIOS, but it appears some people have trouble with the most recent versions, so I'm holding off for now.
Edited by ElevenEleven - 5/27/12 at 7:39am
   
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post #442 of 3170
Quote:
Originally Posted by ElevenEleven View Post

I have an ASRock Extreme 4 z77 motherboard, paired with a Core i7 2600K. No problems so far.
Initially, I put 2 sticks of Samsung 30nm ultra low profile RAM for the total of 8GB and was able to overclock it to 2133MHz 10-11-11-28-1T fully stable at 1.45V DRAM. I later added 2 more of the same sticks, and could not get all 4 to [almost] the same settings and remain stable under prime95 / MemTest (the in-Windows version) up to DRAM of 1.6V, although it was certainly stable enough for normal operations (but I did not want to take risks of having random unanticipated crashes).
I ended up going down to 1866MHz at 9-9-9-24-1T at 1.4V DRAM, which I later bumped to 1.45V just in case, although it was not necessary.
I wonder if I can still get a stable 2133MHz configuration with reasonable timings if I tweak some other voltages. So far, tweaking VTT voltage was not helpful (up to VTT of 1.113V), and in some cases even increased the instability. My CPU voltage is -0.15V offset, although reducing the offset a bit did not help too much.
I have the maximum turbo boost (per core) set to 4.2GHz at Voffset -0.15V.
Definitely interested in tweaking my system more to see if I can get more performance without increasing power consumption and temperatures much if at all. If anyone has any recommendations, I'd appreciate them. I was looking into updating my motherboard BIOS, but it appears some people have trouble with the most recent versions, so I'm holding off for now.

Try increasing VCCSA to stabilize your memory overclock. thumb.gif
post #443 of 3170
Quote:
Originally Posted by jonashendrickx View Post

But BCLK to 99.9 or 100.1 manually and it will be fixed. 100 gives 100.5
Yup that was it, I decided to try it before flashing back to 1.40 and I am stable again. In fact I was able to lower my vcore a bit going up to level1 LLC, ran prime 8 hrs no problem. Hopefully next update fixes the bclk mess.
post #444 of 3170
Quote:
Originally Posted by zerocraft View Post

Yup that was it, I decided to try it before flashing back to 1.40 and I am stable again. In fact I was able to lower my vcore a bit going up to level1 LLC, ran prime 8 hrs no problem. Hopefully next update fixes the bclk mess.

Turn off Speed Spectrum to REALLY fix this error. Changing the BCLK should never be done, really, unless you're super fantastic.
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post #445 of 3170
Quote:
Originally Posted by Erakith View Post

Turn off Speed Spectrum to REALLY fix this error. Changing the BCLK should never be done, really, unless you're super fantastic.
Turning off spread spectrum is literally the first thing I do when overclocking tongue.gif
post #446 of 3170
Quote:
Originally Posted by zerocraft View Post

Turning off spread spectrum is literally the first thing I do when overclocking tongue.gif

Hmm, then it's just weird that CPU-Z was recording off of 100.0 BCLK frequency when set to 100.
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post #447 of 3170
Quote:
Originally Posted by semlethe3rd View Post

Try increasing VCCSA to stabilize your memory overclock. thumb.gif

Would that be safe? I've read that it's better not to touch it...
   
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post #448 of 3170
Quote:
Originally Posted by Erakith View Post

Hmm, then it's just weird that CPU-Z was recording off of 100.0 BCLK frequency when set to 100.
Yup definitely a bug in the bios, everyone reporting 1.60 here seems to have it
Quote:
Originally Posted by ElevenEleven View Post

Would that be safe? I've read that it's better not to touch it...
I just tried it, seems to help, I had some memory based BSOD errors too, QPI/VTT has never helped me in those, increased the VCCSA by 1 step and I think things are stable now. Prime running for 2 hrs, only ran 10 minutes before BSODing my last try.
post #449 of 3170
Hello!!

This memory is good for the z77 extreme4??

http://www.microcenter.com/single_product_results.phtml?product_id=0360527

Thanks
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post #450 of 3170
Quote:
Originally Posted by Type-R View Post

Hello!!
This memory is good for the z77 extreme4??
http://www.microcenter.com/single_product_results.phtml?product_id=0360527
Thanks

Yes that memory would work fine.

Also I stayed at 1.40 because a few people I know told me 1.60 was doing some stuff like people are saying.
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